package com.rong.ruiji.filter;

import com.alibaba.fastjson.JSON;
import com.rong.ruiji.common.BaseContext;
import com.rong.ruiji.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.WebFault;
import java.awt.event.WindowFocusListener;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    //路径匹配，支持通配符
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;

        //1.获取本次请求的uri
        String requestURI = request.getRequestURI();

        log.info("本次请求路径: {}",requestURI);

        //不需要请求处理的路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/login"
        };

        //判断本次请求是否需要处理
        boolean check = check(urls,requestURI);

        //不需要处理，直接放行
        if(check) {
            filterChain.doFilter(request,response);
            return;
        }

        //判断登陆状态，如果已登录，则直接放行
        if(request.getSession().getAttribute("employee") != null) {
            filterChain.doFilter(request,response);
            Long empId = (Long)request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            Long threadId = Thread.currentThread().getId();
//            log.info("当前线程id，{}",threadId);
            return;
        }

        if(request.getSession().getAttribute("user") != null) {
            filterChain.doFilter(request,response);
            Long empId = (Long)request.getSession().getAttribute("user");
            BaseContext.setCurrentId(empId);
//            Long threadId = Thread.currentThread().getId();
//            log.info("当前线程id，{}",threadId);
            return;
        }

        //如果未登录，则返回未登录结果
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
    }

    public boolean check(String[] urls,String requestURI) {
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url,requestURI);
            if (match) {
                return true ;
            }
        }
        return  false ;
    }

}
